Other BLOCK. Other D1 -D24

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1 1. Special Environments D1 1.1 Specifications for Special Environments D1 1.2 Lubrication and Materials D3 1.3 Rust Prevention and Surface Treatment 1.4 Measures Against Special Environments D7 1.5 Table to Cope with Special Environments D Precautions for Handling D12 2. Lubrication D Grease Lubrication D Oil Lubrication D24 3. RoHS Compliant D24 BLOCK D1 -D24

2 1 Special Environments 1.1 Specifications for Special Environments 1. Linear guide 2. Ball screw linear guide specifications Technical Environment Condition Explanation Rail, slide Steel balls/rollers Ball recirculation component Lubrication/surface treatment Page No. LG2, LGU Grease D8 Standard material Standard material Standard material K1 lubrication unit D Atmosphere, LG2, LGU Grease D8 normal temperature Clean K1 lubrication unit D Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel Atmosphere-Vacuum, normal temperature Atmosphere-Vacuum up to 200 C Atmosphere-Vacuum, normal temperature Atmosphere-Vacuum Vacuum up to 200 C Atmosphere-Vacuum up to 300 C Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel Molybdenum disulfide High vacuum up to 500 C Vapor, steam Acid, alkali Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel Standard material Standard material Standard material Special silver film Corrosion Acid, alkali, clean Austenitic stainless steel resistance Martensitic stainless steel Martensitic stainless steel LG2, LGU Grease D8 Strong acid, strong alkali Organic solvent Atmosphere Standard material Standard material up to 150 C High Atmosphere up to 200 C Austenitic stainless steel temperature Martensitic stainless steel Martensitic stainless steel Atmosphere up to 200 C, Corrosion resistant Table 1.1 Linear guide specifications ET-0K Grease Low temperature -273 C and higher Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel Solid lubricant Radiation Standard material Standard material Standard material Atmosphere Radiation resistant grease resistance Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel Fine particles, Standard material Standard material Standard material D Foreign wooden chips Martensitic stainless steel Austenitic stainless steel K1 lubrication unit D matters Water, Martensitic stainless steel Standard material Standard material D under water Martensitic stainless steel Austenitic stainless steel D D7 Environment Condition Atmosphere, normal temperature Table 1.2 Ball screw specifications Ball screw specification Technical Explanation Screw shaft, ball nut Steel balls Ball Recirculation component Lubrication/surface treatment Page No. LG2, LGU Grease D8 Standard material Standard material Standard material K1 lubrication unit D LG2, LGU Grease K1 lubrication unit Clean Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel Atmosphere-Vacuum, normal temperature Atmosphere-Vacuum up to 200 C Atmosphere-Vacuum up to 200 C, Corrosion resistant Atmosphere-Vacuum, normal temperature Ceramic Ceramic Ceramic Atmosphere-Vacuum High vacuum up to 500 C Vacuum up to 200 C Atmosphere-Vacuum Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel up to 300 C Molybdenum disulfide Special silver film D7 Standard material Standard material Corrosion Acid, alkali, clean Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel resistance Precipitation hardening Precipitation hardening stainless steel stainless steel Strong acid, strong alkali, clean, nonmagnetic Ceramic Ceramic Atmosphere-Vacuum, Special austenitic clean stainless steel Nonmagnetic Ceramic Austenitic stainless steel Atmosphere-Vacuum, up to 200 C, clean Ceramic Fluoroplastic Atmosphere up to 200 C Standard material Standard material High Atmosphere up to 200 C Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel temperature Atmosphere up to 500 C, Ceramic Ceramic corrosion resistance Low temperature -273 C and higher Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel Solid lubricant Radiation Standard material Standard material Standard material Atmosphere Radiation resistant grease resistance Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel Fine particles, Standard material Standard material Standard material D Foreign wooden chips K1 lubrication unit D matters Martensitic stainless steel Martensitic stainless steel Austenitic stainless steel Water, under water D D8 D D1 D2

3 1.2 Lubrication and Materials 1. Lubrication Grease can be used for high rotation and magnetic field. However, grease evaporates or solidifies in special environment such as vacuum, high temperature, and low temperature. Solid lubricant is used when it is difficult to use grease. Functions of solid lubricant differ greatly by condition where it is used. It is important to select the most suitable solid lubrication for the environment. in air in vacuum 200 Temperature, C Graphite Molybdenum disulfide Particles/ Tungsten disulfide 2 1 Pa Gold Low-dust greases Ordinary greases Oils, greases for lubrication in vacuum Solid lubricants Silver Ordinary lubricating oils, greases Lead Solid lubricants Fig. 2.1 Lubrication in clean environment in liquids Fluororesins Fig. 2.2 Lubrication in vacuum in gases Fig. 2.7 Temperature range for using solid lubricants 300 C 2. Materials Fluorine grease Ordinary lubricating oils, greases High-temperature lubricating oils High-temperature greases Solid lubricants Fig. 2.3 Lubrication in corrosive environment Liquid hydrogen Liquid oxygen Iron type metals are used in vacuum, high temperature, and high speed environments as Solid lubricants Table 2.1 Characteristics of metal materials Fig. 2.4 Lubrication in high temperature C the basic material. We generally use nonmagnetic stainless steel for nonmagnetic materials. 8 9 Application Type of steel Linear expansivity -6/ C Young's modulus GPa Hardness* HB For clean environment, Martensitic stainless steel SUS440C Austenitic stainless steel SUS radioactive resistance Precipitation hardening stainless steel SUS Nonmagnetic Nonmagnetic stainless steel Rad LNG Low-temperature Ordinary lubricating oils, lubricating greases oils, greases Ordinary lubricating oils, greases Special lubricating oils, greases Solid lubricants Solid lubricants Fig. 2.5 Lubrication in low temperature Fig. 2.6 Lubrication in radioactive environment vacuum environment, corrosion resistance, low temperature, high temperature, *) Hardness of steel is usually indicated by Rockwell C Scale. For comparison, these figures are expressed by Brinell number. D3 D4

4 1.3 Rust Prevention and Surface Treatment 1. The use environment of linear guides ball screws, and monocarriers is expanding from general industrial machines, semiconductor and liquid crystal manufacturing systems to aerospace equipment. Among all measures to cope with environment, rust prevention is the most challenging. Such environment includes: Moisture for washing machines and other equipment Chemicals used in the wet processing of semiconductor and liquid crystal display manufacturing equipment. has developed electrolytic rust prevention black film treatment (black ) which is added by fluoro resin impregnating treatment. (Hereinafter referred as " ".) This surface treatment methods has proved its superiority as the rust prevention of linear guides and ball screws which are used in the above equipment. A Humidity chamber test Rusting Table 3.1 Results of the humidity test A What is "?" This is a type of black which forms a black film (1 to 2 μm in thickness) on the metal surface. Fluoroplastic coating is added to the film to increase corrosion resistance. Accuracy control is easily manageable due to low temperature treatment and to the absence of hydrogen embrittlement. Product accuracy is less affected due to the thin film which has high corrosion resistance. This method is superior to other surface treatments in durability on the rolling surface. Inexpensive compared with products with other surface treatment and stainless steel products. Do not use organic solvent because it adversely affects antirust property of the plating. Test sample Hard Electroless nickel plating Equivalent to SUS440C material Standard steel Characteristic (recommended) (reference) (reference) Top (Ground) B (Ground) B (Ground) A (Ground) C (Ground) D Side (Ground) A (Ground) A (Ground) A (Ground) C (Ground) E Bottom (Ground) A (Ground) A (Ground) A (Ground) C (Ground) E End (Machined) A (Machined) C (Machined) A (Machined) C (Machined) E Chamfer/grinding recess (Drawn) A (Drawn) D (Drawn) A (Drawn) C (Drawn) E A Chemical corrosion resistance test Table 3.2 Results of the corrosion resistance test Immersed in solution for 24 hrs Nitric acid Immersed in solution for 24 hrs Fluoride Exposed to vapor for 72 hrs Hydrochloric acid type washing solution Test conditions Rail base material: Equivalent to SUS440C Chemical density: 1 mol/l Hard HCR: H 2O 2 : H 2O =1 : 1 : 8 f Hydrochloric acid (immersed) f B f Sulfuric acid (immersed) f X f Ammonia or sodium hydroxide f b f: Normal b: Partial surface damage B: Overall surface damage X: Corroded None surface treatment Corrosion-resistant property <Test conditions> A Testing chamber: High temperature, highly moist chamber (made by DABAI ESPEC) A Temperature: 70 C A Relative humidity: 95% [ A Testing time: 96 h ] Time to "ramp-up" and "ramp-down" condition of the temperature and the humidity conditions Ramp-up: Ramp-down: 5 h 2 h Film thickness 5 μm μm μm Rusting A: No rust B: Not rusted, but slightly discolored C: Spotty rust D: slightly rusted E: Completely rusted A Surface treatment durability test Ratio to the rated life (Lh) Peeling resistamce of surface treatment Form of groove after running -1 1 μm Cr plating (5 μm film thickness) Form of groove after running -1 1 μm 0.05 Form of groove after running -1 1 μm Hard Electrolysis nickel plating (0.5-7 μm film thickness) ( μm) (No hardening treatment) Fig. 3.1 Results of durability test A Total evaluation Table 3.3 Evaluation Rust prevention Available length ability Quality stability Durability Cost F (4 m) F f F F Hard b (2 m) f X b b Electroless nickel plating F (4 m) F b X b Material equivalent to SUS440C f (3.5 m) f F F b F: Excellent f: Suitable in use b: Not so good for use X: Problem in use D6

5 1.4 Measures Against Special Environments 1. In vacuum A Silver-film plated ball screw Ball screws that are plated by soft metal (special silver film) as a solid lubricant are developed the application for vacuum environment such as semiconductor manufacturing equipment and surface modification systems. A Durability test in high vacuum Test equipment and conditions Table 4.1 shows ball screw specifications. Fig. 4.1 is a schematic of the testing system in vacuum chamber. Table 4.2 shows testing conditions. Table 4.1 Ball screw specifications Shaft diameter 12 mm Lead 4 mm Steel ball diameter mm Numbers of circuit of balls 2.5 turns, 1 circuit Axis load (preload) 29.4 N Maximum surface pressure (preload volume) about 690 MPa Shaft SUS630 Nut SUS440C Ball return tube SUS304 Steel balls SUS440C Solid lubricant Special silver film Material Table 4.2 Testing conditions Rotational speed 300 min 1 Vacuum chamber Pa pressure Stroke 160 mm Evaluation method It is understood that the rolling bearing with solid lubrication reaches end of life when the lubrication film deteriorates, resulting in sudden rise of friction torque. In this test, ball screw rotation torque was constantly measured to study durability and operation. Results were then evaluated. Test results Fig. 4.2 shows two distinctive examples obtained in the torque characteristic test. Test results of the ball screw (a) The torque tendency was stable until about 1 7 rev. Then the torque characteristics slightly deteriorated. At about rev, the torque suddenly rose. At this point, it was determined that the ball screw reached the end of its life. Test results of the ball screw (b) Torque value is a little higher in the test (a). The value is also little unstable. The torque momentarily soared several times during the test (some N cm). It is thought this is attributable to the repeated peeling/ sticking of the surface film made of soft metal (silver, etc.). When the torque finally soared at rev., it was determined that the ball screw reached the end of its life. Torque, N cm 5 Photo 4.1 Vacuum testing system Vacuum chamber Spring Motor Fig. 4.1 Schematic of the testing system Ball screw (a) Ball screw (b) Sharp rise ( 7 ) Total revolutions, rev. Fig. 4.2 Torque variation Life Table 4.3 Ball screw durability Classification Ball screw (a) Ball screw (b) Total revolutions (rev.) Total traveling distance (km) Total traveling hours * (h) *) Total traveling hours when operated constantly at 300 min 1 Conclusion Table 4.3 explains results of the two ball screw durability tests. From these results and other findings, it is estimated that a life of more than 1 7 rev. is possible with a load of about 29.4 N. Torque may soar momentarily before the ball screw reaches its final life due to peeling/sticking of the surface film made of soft metal like silver. For this reason, it is recommendable to select a drive motor with extra torque capacity. 2. Clean environment A Clean Grease LG2 and LGU Table 4.4 Nature of Clean Grease LG2 and LGU Name Thickener Base oil Base oil kinematic viscosity Dropping point Consistency mm 2 /s (40 C) C Clean Grease LG2 Lithium soap Synthetic hydrocarbon oil + mineral oil Clean Grease LGU Diurea Synthetic hydrocarbon oil Particle counter Clean air Support bearing Ball screw Magnetic liquid seal Fig. 4.3 Setting to measure dust generated by ball screw Clean Grease LG2 is used in clean room for linear guides, ball screws, Monocarriers, XY Modules, Megatorque motors, XY tables, etc. with low-dust emitting specifications. For its low dust emission and high durability, LG2 earns trust and high reputation of semiconductor equipment manufacturers. LG2 is superior in many areas to fluorine greases which are commonly used in clean room. Features A Remarkably low dust emission A Long life -- More than ten times longer than fluoride greases, and equivalent to ordinary greases. A Excellent rust prevention -- Significantly higher capacity than fluorine greases. A Low and stable torque -- 20% or less than that of fluorine greases Support bearing Coupling Magnetic liquid seal Motor D7 D8

6 A Feature 1: Remarkably low dust emission Compared with fluoride greases, dust emission by LG2 is low and stable for long period of time. Dust count (0.3 m or larger), particles / Fluorine grease A Ball screw Screw dia.: 15 mm Lead: mm Speed: min 1 Ordinary grease B Ordinary grease A Fluorine grease B LG2 with seal Time, h Fig. 4.4 Comparison in dust emission characteristics A Feature 2: Long life Life is ten times or longer than fluorine greases, and equivalent to ordinary greases. This stretches maintenance intervals. LG2 Dust count (0.5 μm or larger), particles / LG2 Grease C: fluorine oil/fluorine compounds Time, h Fig. 4.5 Dust emission from linear guide (Linear guide: LU09) AFeature 3: Excellent rust prevention capacity The rust prevention capacity is significantly higher than fluoride type greases. Handling and preparation for operation are easy. Ball screw rust prevention test (test conditions: 96 hr at humidity 95%, temperature 70 C) No rust Rusting No rust Clean Grease LG2 Fluorine grease A Ordinary grease A A Feature 4: Stable torque Torque is 20% or lower than fluorine greases Photo 4.2 Ball screw Screw dia.: 25 mm Lead: 5 mm Preload: 294 N Table 4.5 Rust prevention test on bearing Type Rusting after 7 days Clean Grease LG2 No rust Fluorine grease B Rusted Test conditions : 19 mg is sealed in ball bearing 695 : Temp. 90 C, Humidity 60% Evaluation : Studied by microscope A Total evaluation Table 4.6 Evaluation Characteristic LG2 Fluorine grease General grease Dust generation f f b b X Torque f X f b Durability f b X f Rust prevention ability f b X f f: Suitable b: Not very suitable X: Problem in use 3. Environment with foreign matters A K1 lubrication unit (linear guide and ball screw) Backlash (change in backlash with wear), μm 20 0 Measurements stopped owing to severe wear Fluorine grease A Appearance of fluorine grease (after 360 km) abrasion dust formed owing to insufficient lubrication Distance traveled, km Fig. 4.6 Results of ball screw durability test Appearance of Clean Grease LG2 (after km) No change LG2 Ball screw Screw dia. : 14 mm Lead : 5 mm Speed : min 1 Dynamic torque, N m Fluorine grease A LG Speed, min 1 Fig. 4.7 Comparison of torque characteristics Molded oil is made of a lubrication oil and polyolefin which has affinity with the lubrication oil. More than 70% of the mass is lubrication oil. Molded oil which is formed into K1 lubrication unit effectively seals linear guides, continually supplying lubrication oil. K1 lubrication unit has made it possible to use linear guides in water or powder dust. K1 lubrication unit for ball screws is also available. For monocarriers, K1 is equipped as a standard feature. Features A Extend maintenance-free intervals A No contamination of surrounding environment A Prolong life of the products exposed to water D9 Refer to pages A38, B569 and C139 for details of K1 lubrication unit. D

7 1.5 Table to Cope With Special Environments 1. Linear guides Special environment which linear guide can tolerate Clean Vacuum Corrosion High temp. Hygienic High dust proofing NH15 f f f NH20 f f f f f NH25 f f f f f NH30 f f f f f NH NH35 f f f f NH45 f f f NH55 f f NH65 f f VH15 f f f VH20 f f f VH25 f f f VH VH30 f f f VH35 f f f VH45 f f f VH55 f f f TS15 f f TS20 f f TS TS25 f f TS30 f f TS35 f f NS15 f f f f f NS20 f f f f f NS NS25 f f f f f NS30 f f f f* f NS35 f f f LW17 f f f* f LW21 f f f* f LW LW27 f f f f LW35 f f f LW50 f f PU05 f f PU07 f f PU PU09 f f f PU12 f f f PU15 f f f LU05 f f LU07 f f LU09_L f f f f f LU LU09_R f f f LU12_L f f f f f LU12_R f f f LU15 f f f f* f *) Dust-proof parts are not applicable to high-temperature environmental use. Special environment which linear guide can tolerate Clean Vacuum Corrosion High temp. Hygienic High dust proofing PE05 f f PE07 f f PE PE09 f f f PE12 f f f PE15 f f f LE05 f f LE07 f f f f* LE09_L f f f f* f LE LE09_R f f f LE12_L f f f f f LE12_R f f f LE15_L f f f f f LE15AR f f f LH08 f f LH f f LH12 f f f RA15 f f RA20 f f RA25 f f RA RA30 f f RA35 f f RA45 f f RA55 f f RA65 f f LA25 f f LA30 f f LA LA35 f f LA45 f f LA55 f f LA65 f f HA25 f f HA30 f f HA HA35 f f HA45 f f HA55 f f HS15 f f HS20 f f HS HS25 f f HS30 f f HS35 f f 2. Ball screws Special environment Clean Vacuum Rust prevention High temp. Foreign matters KA f f f For Contaminated environments VSS Type f Made-to-order ball screw f * f * f * f * f * *Available in the made-to-order ball screw. Please consult. 3. Monocarriers Please consult with for special environmental use. 1.6 Precautions for Handling Please observe the following precautions to maintain high functions of ball screws and linear motion guide bearings in special environment over a long period. Products are washed to remove oil, and wrapped in a way to protect them from moisture. Use the product as soon as possible after opening the package. After opening, store the ball slide (randommatching type linear guide) and ball nut (R series ball screw) in a clean, air-tight container such as desiccater with desiccating agent (e.g. silica gel). Do not apply rust preventive oil or paper or product that vaporizes rust preventive agent. Wear plastic gloves and handle product in clean place. D11 D12

8 2. Lubrication There are two types of lubricating method -- grease and oil -- for ball screws, linear guides and monocarriers. Use a lubricant agent and method most suitable to condition requirements and purpose to optimize functions of ball screws, linear guides and monocarriers. In general, lubricants with low base oil kinematic viscosity are used for high-speed operation, in which thermal expansion has a large impact, and in low temperatures. Lubrication with high base oil kinematic viscosity is used for oscillating operations, low speeds and high temperatures. The following are lubrication methods using grease and oil. 2.1 Grease Lubrication Grease lubrication is widely used because it does not require a special oil supply system or piping. Grease lubricants made by are: Various types of grease in bellows tubes that can be instantly attached to a grease pump; Grease Unit that consists of a hand grease pump and various s. They are compact and easy to use. 1. grease lubricants Table 1.1 shows the marketed general grease widely used for linear guides, ball screws, and monocarrier for specific uses, conditions and purposes. (1) Grease AS2 Features It is an environmentally friendly and widely used grease for high load application. It is mineral oil based grease containing lithium thickener and several additives. It is superb in load resistance as well as stability in oxidization. It not only maintains good lubrication over a long period of time, but also demonstrates superb capability in retaining water. Even containing a large amount of water, it does not lose grease when it is softened. Application It is a standard grease for general linear guides, ball screws and monocarriers. It is prevalently used in many applications because of its high base oil viscosity, high load resistance, and stability in oxidization. Nature Thickener Lithium soap base Base oil Mineral oil Consistency 275 Dropping point 181 C Volume of evaporation 0.24% (99 C, 22 hr) Copper plate corrosion test Satisfactory (Method B, 0 C, 24 hr) Oil separation 2.8% (0 C, 24 hr) Base oil kinematic viscosity 130 mm 2 /s (40 C) D13 Table 1.1 Grease lubricant for linear guides, ball screws and monocarriers Type Thickener Base oil Base oil kinematic viscosity Range of use Purpose mm 2 /s (40 C) temperature ( C) AS2 Lithium type Mineral oil For general use at high load PS2 Lithium type Synthetic oil For low temperature and high + synthetic frequency operation hydrocarbon oil LR3 Lithium type Synthetic oil For high speed, medium load LG2 Lithium type Mineral oil For clean environment + synthetic hydrocarbon oil LGU Diurea Synthetic For clean environment hydrocarbon oil NF2 Urea composite type Synthetic For fretting resistance hydrocarbon oil (2) Grease LR3 Features It contains a special synthetic oil for high temperature and stability, and a carefully selected anti-oxidation agent. This grease dramatically increases lubrication life under high temperature conditions. It is used for high speed, medium load. Lubrication life exceeded hours in the endurance test at 150 C. Its rust prevention capacity in severe conditions such as water and moist environments is further strengthened. Application It is a standard grease for ball screws PSS type (shaft dia. 15 mm or over), FSS type, FA type (except shaft dia. mm with lead of 4mm and shaft dia. 12 mm with lead of 5 mm) and VFA type. It is ideal for operation with medium load, at high speed such as positioning in high tact material handling equipment. (3) Grease PS2 Features The major base oil component is synthetic oil with mineral oil. It is an excellent lubrication especially for low temperature operation. It is for high speed and light load. Application It is a standard grease for miniature linear guides and ball screws. It is especially superb for low temperature operation, but also functions well in normal temperatures, making it ideal for small equipment with light load. Nature Thickener Lithium soap base Base oil Synthetic oil Consistency 228 Dropping point 208 C Volume of evaporation 0.58% (99 C, 22 hr) Copper plate corrosion test Satisfactory (Method B, 0 C, 24 hr) Oil separation 1.9% (0 C, 24 hr) Base oil kinematic viscosity 30 mm 2 /s (40 C) Nature Thickener Lithium soap base Base oil Synthetic oil + Synthetic hydrocarbon oil Consistency 275 Dropping point 190 C Volume of evaporation 0.60% (99 C, 22 hr) Copper plate corrosion test Satisfactory (Method B, 0 C, 24 hr) Oil separation 3.6% (0 C, 24 hr) Base oil kinematic viscosity 15.9 mm 2 /s (40 C) D14

9 (4) Grease LG2 Features This grease was developed by to be exclusively used for linear guides and ball screws in clean room. Compared to the fluorine grease which are commonly used in clean room, LG2 has several advantages such as: Higher in lubrication function Longer lubrication life More stable torque (resistant to wear) Higher rust prevention. In dust generation, LG2 is more than equal to fluorine grease in keeping dust volume low. Since the base oil is not a special oil but a mineral oil, LG2 can be handled in the same manner as general greases. Application LG2 is a lubrication grease for rolling element products such as linear guides and ball screws for semiconductor and liquid crystal display (LCD) processing equipment which require a highly clean environment. Because LG2 is exclusively for a clean environment at normal temperatures, however, it cannot be used in a vacuum environment. Refer to "Special environment" in page D8 for detailed data on superb characteristics of Grease LG2. Nature Thickener Lithium soap base Base oil Mineral oil + Synthetic hydrocarbon oil Consistency 199 Dropping point 201 C Volume of evaporation 1.40% (99 C, 22 hr) Copper plate corrosion test Satisfactory (Method B, 0 C, 24 hr) Oil separation 0.8% (0 C, 24 hr) Base oil kinematic viscosity 32 mm 2 /s (40 C) (5) Grease LGU Features This is a proprietary urea base grease of featuring low dust emission exclusively for ball screws and linear guides which are used in clean rooms. In comparison with fluorine base grease, which has been used commonly in clean rooms, LGU has better lubricating property, longer duration of lubricant, better torque variation, much better anti-rust property, and equivalent or better dust emission. In addition, this grease can be handled in the same way as the other common grease because high-grade synthetic oil is used as the base oil. LGU grease contains much less metallic elements compared to LG2 grease. It can be used in high temperature environment. Application This is exclusive lubrication grease for ball screws and linear guides that are installed in equipment that requires cleanliness, as same as LG2 grease, and it can be used in high temperature range of 30 to 120 C. This cannot be used in vacuum. Nature Thickener Diurea Base oil Synthetic hydrocarbon oil Consistency 201 Dropping point 260 C Volume of evaporation 0.09% (99 C, 22 hr) Copper plate corrosion test Satisfactory (Method B, 0 C, 24 hr) Oil separation 0.6% (0 C, 24 hr) Base oil kinematic viscosity 95.8 mm 2 /s (40 C) (6) Grease NF2 Features It uses high-grade synthetic oil as the base oil and urea base organic compound as the thickener. It has remarkable anti-fretting corrosion property. It can be used in wide temperature range, from low to high, and has superior lubrication life. Application This grease is suitable for ball screws and linear guides of which application include oscillating operations. Allowable temperature range is 40 to 0 C. Nature Thickener Diurea Base oil Synthetic hydrocarbon oil Consistency 288 Dropping point 260 C Volume of evaporation 0.22% (99 C, 22 hr) Copper plate corrosion test Satisfactory (Method B, 0 C, 24 hr) Oil separation 0.5% (0 C, 24 hr) Base oil kinematic viscosity 26 mm 2 /s (40 C) Precautions for handling Wash the linear guides and ball screws to remove oil prior to applying Clean Grease LG2 or LGU, so the grease functions are fully utilized. Clean grease is exclusively used for clean environments at normal temperatures. Note) Refer to Grease Unit Catalog (CAT. No.3317) for details of Grease. 2. Before use of Precision Products Wipe off the rust preventive oil before use for the products that the oil is applied. If grease is not applied, apply grease, and move a ball slide or ball nut a few strokes so the grease permeates into the ball slide and inside the nut. (Move the ball slide or the ball nut 5 to times with full stroke.) Then wipe off the excess grease. 3. How to replenish grease and volume of grease to be replenished Use grease if exclusive grease supply component is not used. Supply required amount through grease by a grease pump. Wipe off old grease and accumulated dust before supplying new grease. If grease is not used, apply grease directly to the rail or to the ball groove of the screw shaft. Move a ball slide or ball nut a few strokes so the grease permeates into the ball slide and inside the nut. Once grease is replenished, another supply is not required for a long time. But under some operational conditions, it is necessary to periodically replenish grease. The following are replenishing methods. * When replenishing using a grease pump: Use a grease pump and fill the inside of ball slide, ball nut and monocarrier slider with grease. Supply grease until it comes out from the ball slide, ball nut or monocarrier slider area. Move ball slide, ball nut or monocarrier slider by hand while filling them with grease, so the grease permeates all areas. Do not operate the machine immediately after replenishing. Always try the system a few times to spread the grease throughout the system and to remove excess grease. Trial operations are necessary because the resistance to sliding force and screw torque greatly increases immediately after replenishment (full-pack state) and may cause problems. The agitating resistance of grease is accountable for this phenomenon. Wipe off excess grease that accumulates at end of rail and screw shaft after trial runs so the grease does not move to other areas. * When there is an exclusive grease supply system and the volume from the spout can be controlled, the criterion is: All at once, replenish the amount that fills about 50% of the internal space of the ball slide or the internal space of the ball nut. This method eliminates waste of grease and is efficient. Tables 1.2, 1.3 and 1.4 show internal spaces of ball slide, ball nut and monocarrier slider for reference. D15 D16

10 Table 1.2 Inside space of the slide of linear guide NH NH High-load type Ultra-high-load type VH VH High-load type Super-high-load type TS TS NS NS Medium-load type High-load type RA RA High-load type Super-high-load type D17 LW Unit: cm 3 LW PU, LU PU LU Standard type High-load type Standard type High-load type PE, LE PE LE Standard type High-load type Medium-load type Standard type High-load type Miniature LH LH Table 1.3 Inside space of ball nut Return tube type (single nut) Nut model Inside space Nut model Inside space Nut model Inside space Nut model Inside space Deflector (bridge) type (single nut) Nut model Inside space End cap type Nut model Inside space Table 1.4 Inside space of the monocarrier MCM Lead Inside (mm) space Lead Inside (mm) space MCM MCM MCM MCM MCM Intervals of checks and replenishments Although the grease is of high quality, it gradually deteriorates and its lubrication function diminishes. Also, the grease in the ball slide and ball nut is gradually removed by stroke movement. In some environments, the grease becomes dirty, and foreign MCH Note: Nut model: shaft diameter, lead, total number of turns of balls Please consult for other specifications. Refer to B1 to B146 for Compact FA. Lead Inside (mm) space MCH MCH MCH objects may enter. Grease should be replenished depending on frequency of use. The following is a guide of grease replenishment intervals for linear guides and ball screws. LA HA, HS Table 1.5 Intervals of checks and replenishments for grease lubrication Intervals of checks Items to check Intervals of replenishments LA HA HS 3-6 months Dirt, foreign matters such as Usually once per year. Every km for material handling High-load type Super-high-load type cutting chips system that travels more than km per year. Replenish if checking results warrant it necessary Notes: 1) As a general rule, do not mix greases of different brands ) Grease viscosity varies by temperature. Viscosity is particular high in winter due to low temperatures Pay attention to increases in linear guide and monocarrier sliding resistance and ball screw and monocarrier torque in such conditions. 3) When the ambient temperature is low, or in Winter, if it is difficult to pump out the grease from the container, wait until the grease is softened. 4) In locations where coolant is dispersed or scattered, emulsification of lubricants and rinsing with water may significantly deteriorate the integrity of the lubricant and efficiency of the grease. Protect the grease unit from coolant by shielding it with a cover, etc. D18

11 5. Grease Unit Supply grease to linear guides and ball screws by manual type hand grease pump. Install grease in bellows tube to the pump. Several types of grease (80 g) are available. (2) Greases (80 g in bellows tube) Refer to pages D14 and D15 for their natures and details. Screw P = 2.5 mm Number of turns: 2.5 turns j14.8 j max. 158 mm Grease in bellows tube Fig. 1.1 Bellows tube (1) Composition of Grease Unit (3) Manual Grease Pump Unit (250) Rc1/8 Nozzle can also be set in this direction. Components and grease types are shown below. a) Hand Grease Pump (Reference number: HGP) Nozzle 212 D19 Grease Unit Name (Tube color) Reference number Grease Grease AS2 (Brown) GRS AS2 (80 g in a bellows tube) Grease PS2 (Orange) GRS PS2 Grease LR3 (Green) GRS LR3 Grease LG2 (Blue) GRS LG2 Grease LGU (Yellow) GRS LGU Grease NF2 (Gray) GRS NF2 Hand Grease Pump Unit Hand Grease Pump HGP (Straight HGP NZ1 -- One is provided with hand pump.) Grease (used with hand grease pump) straight chuck drive point flexible flexible extension pipe straight extension pipe for MCH HGP NZ1 HGP NZ2 HGP NZ3 HGP NZ4 HGP NZ5 HGP NZ6 HGP NZ7 HGP NZ8 A Features Light-weight Can be operated by one hand, yet there is no worry to make a mistake. Inserting by high pressure Insert at 15 Mpa. No leaking Does not leak when held upside down. Easy to change grease Simply attach grease in bellows tube. Remaining grease Can be confirmed through slit on tube. Several s Six types of s to choose from. A Specifications Discharge pressure 15 Mpa Spout volume 0.35 cc/shot Mass of main body Without 240 g Provided 90 g Grease tube outer diameter j38.1 Accessory Several s for a unique application can be attached j 1 hand grease pump 2 straight j Pump Fig. 1.2 Hand Grease Pump with straight *Air is contained in the unopened bellows tube. Try the system tens of times when to use the hand grease pump. The tube will be use after deflated from the tube. (204) D20

12 b) Nozzles Table 1.6 Nozzles that can be attached to Hand Grease Pump Name Designation code Use Dimensions straight chuck point flexible HGP NZ1 HGP NZ2 HGP NZ3 HGP NZ4 HGP NZ5 Can be used with grease A, B, and C under JIS B1575 standard. Same as above. However, there is no need to press the hand pump because the grease and the come to contact due to the chucking mechanism at the tip. Dedicated for the -j3 drive-in grease. Used for linear guides and ball screws which do not have grease. Supplies grease directly to the ball grooves, or through the opening of ball slide or ball slide to inside. The tip of the flexible is chuck. The straight is not available for use. j6.5 j14 j j12 j Tip.j HEX. 11 M6 1.0 j (135) (300) j 120 j 14HEX. 8 j 8 j Drive-in type Screw-in type Table 1.7 Grease s used for linear guide Model number Straight Chuck Drive-in nipple Point Flexible Tap hole for Standard grease s grease NZ1 NZ2 NZ3 NZ4 NZ5 NH15 j3 Drive-in type f NH NH20, 25, 30, 35 * M B type f f f NH45, 55, 65 Rc1/8 B type f f f VH15 j3 Drive-in type f VH VH20, 25, 30, 35 * M B type f f f VH45, 55 Rc1/8 B type f f f TS TS15 j3 Drive-in type f TS20, 25, 30, 35 * M B type f f f NS NS15 j3 Drive-in type f NS20, 25, 30, 35 * M B type f f f LW17 j3 Drive-in type f LW LW21, 27, 35 * M B type f f f LW50 Rc1/8 B type f f f PU PU05, 07, 09, 12 f PU15 j3 Drive-in type f LU LU05, 07, 09, 12, 15 f PE PE05, 07, 09, 12 f PE15 j3 Drive-in type f LE LE05, 07, 09, 12, 15 f LH08, f Miniature LH LH12 j3 Drive-in type f RA15, 20 j3 Drive-in type f RA RA25, 30, 35 * M B type f f f RA45, 55, 65 Rc1/8 B type f f f LA LA25, 30, 35 * M B type f f f LA45, 55, 65 Rc1/8 B type f f f HA HA25, 30, 35 * M B type f f f HA45, 55 Rc1/8 B type f f f HS HS15 j3 Drive-in type f HS20, 25, 30, 35 * M B type f f f *) If using a chuck, avoid interference with table and rail. Note: 1) For PU, PE, LU, and LE, apply grease directly to ball groove, etc. using point. 2) A long threaded grease is required for linear guides because of dust-proof parts. Please refer to the sections pertaining to the lubrication and dust-proof parts of each series. Small grease A type B type C type flexible extension pipe HGP NZ6 Flexible extension pipe connects the grease pump and the Rp1/8 14HEX. j.5 (300) 14HEX. j j3 j4.5 width across flat 4 M3 x 0.5 (5) straight extension pipe HGP NZ7 Straight extension pipe connects the grease pump and the. Rp1/ HEX. j (317) M5 x 0.8 (compact FA ) Fig. 1.3 Grease s for MCH HGP NZ8 For MCH grease replenishment j6 7.5 (180) HEX. (j6) 40 D21 D22

13 Finished shaft end Blank shaft end Tap hole for grease Compact FA Table 1.8 Applicable grease for ball screws USS A type a a a a PSS M5 0.8 A type a* 1 a* 1 a a* 1 FSS A type a* 1 a* 1 a a* 1 MA Shaft dia. 12 or less a Shaft dia. 16 or over M6 1 a FA M6 1 a* 2 a* 2 a a* 2 SA Shaft dia. 36 or less M6 1 a a a a Shaft dia. 40 or over Rc1/8 a a a a Shaft dia. 12 or less KA and M3 0.5 a a lead 2 or less except above M6 1 a* 2 a* 2 a a* 2 VFA Shaft dia. 12 or less j2.7 a Shaft dia. 15 or over j3.5 a RMA a MS Shaft dia. 12 or less a Shaft dia. 16 or over M6 1 a FS M6 1 a* 2 a* 2 a a* 2 SS Shaft dia. 36 or less M6 1 a a a a Shaft dia. 40 or over Rc1/8 a a a a HSS M6 1 a a a a RMS a RNFTL Shaft dia. 12 or less M3 0.5 a a Shaft dia. 14 or over M6 1 a a a a RNFBL Shaft dia. 12 or less M3 0.5 a a Shaft dia. 14 or over M6 1 a a a a RNCT a RNFCL Shaft dia. 12 or less M3 0.5 a a Shaft dia. 15 or over M6 1 a a a a RNSTL M6 1 a a a a *1 Unavailable for shaft dia. 25 mm *2 If using A type grease, may not install the. Notes: 1) Normally, grease is not provided to ball screw except Compact FA. Ball nut has a tap hole to install a grease. The user should install a grease if necessary. 2) For M3 0.5 tap hole, small (screw-in type) is available. Please contact. 3) VFA type cannot install grease. Apply grease directly to inside the nut through oil hole using point. 4) MA, RMA, MS, RMS, and RNCT types have no tap hole, apply grease directly to the screw shaft and ball grooves using point. Table 1.9 Applicable grease s for Monocarriers High-accuracy, clean General Transfer equipment Miniature, fine lead Small equipment Machine tools Stainless steel Transfer equipment Miniature, fine lead Small equipment Machine tools Transfer equipment Model no. Model no. Tap hole for grease Standard grease Standard grease Straight NZ1 Straight NZ1 Chuck s NZ2 Chuck s NZ2 Drive-in NZ3 Drive-in NZ3 Point NZ4 Flexible NZ5 Flexible NZ5 MCH exclusive NZ8 MCM02 MCM MCM03,05,08, j3 Drive-in type a a* MCM06 M A type a a a MCH MCH06,09, j3 Drive-in type a *) Use of NZ3 is recommended. 2.2 Oil Lubrication Required amount of new oil is regularly supplied by: Manual or automatic intermittent supply system; Oil mist lubricating system via piping. Equipment for oil lubrication is more costly than grease lubrication. However, oil mist lubricating system supplies air as well as oil, raising the inner pressure of the ball slide. This prevents foreign matters from entering, and the air cools the system. Use an oil of high atomizing rate such as ISO VG 32 to 68 for the oil mist lubrication system. ISO VG 68 to 220 are recommended for common intermittent replenishment system. Approximate volume of oil Q for a ball slide of linear guide per hour can be obtained by the following formula. In case of ball type linear guides except the LA Q = n/150 (cm 3 /hr) In case of LA, RA Q n/0 (cm 3 /hr) n: Linear guide code e.g. When NH45 is used, n = 45 Therefore, Q = 45/150 = 0.3 cm 3 /hr 3. RoHS Compliant 1. Linear Guides Linear Guides listed in the catalog except the products for special environments, are compliant with RoHS. Please consult for RoHS of special parts and lubricant provided by customer, and customersupplied product. 2. Ball Screws Ball screws listed in the catalog except the products for special environments, are compliant with RoHS. 3. Monocarriers Monocarriers listed in the catalog are compliant with RoHS. 4. Ball Screw Support Bearings Ball screw support bearings listed in the catalog are compliant with RoHS. *For details of country-specific RoHS, contact. Similarly, approximate oil supply volume Q to ball screw can be obtained by the following formula. Q = d /15 (cm 3 /hr) d: Nominal shaft diameter of the ball screw e.g. When the shaft diameter is 50, d = 50 Therefore, Q = 50/15 = 3.3 cm 3 /hr For oil lubrication by gravity drip, the oil supply position and installation position of the ball slide or ball nut are crucial. In case of linear guide, unless it is installed to a horizontal position, the oil flows only on the down side, and does not spread to all raceway surface. This may cause insufficient lubrication. For ball screw lubrication as well, oil does not spread if the oil orifice is installed at the bottom, causing insufficient lubrication. Please consult to correct such situations prior to use. has internal design which allows oil lubricant to flow throughout the system. Table 2.1 shows the criterion of intervals of oil checks and replenishments. Table 2.1 Intervals of checks and replenishments Method Intervals of checks Items to check Replenishment or intervals of changes Automatic intermittent supply Weekly Volume of oil, dirt, etc. Replenish at each check. Suitable volume for tank capacity. Oil bath Daily before operation Oil surface Make a suitable criterion based on consumption Notes: 1) As with grease lubrication, do not mix oil lubricant with different types. 2) Some components of the linear guide and ball screw are made of plastic. Avoid using an oil that adversely affects synthetic resin. 3) When using oil mist lubricating system, please confirm an oil supply amount at the each outlet part. D23 D24